Mötley Crüe guitarist Mick Mars is being sued for $10 million by a woman who claims the musician backed out of a promise to take care of her for life.

A lawsuit was filed against Mars on Tuesday by former girlfriend Robbie Mantooth, who claims that Mars repeatedly pledged that he would always provide for her financially and that they would evenly split their property if they ever broke up, according to Reuters.

Mantooth claims in the suit, filed in a Los Angeles court, that she and Mars became involved in 1990, shortly after they met, and that she quit her job as a documentary filmmaker to live in Mars' Malibu, California, home with him.

She claims that when the couple broke up this past December, Mars would not acknowledge their oral agreement and has refused to give her financial support.

In the palimony suit — in which a member of an unmarried couple asks for monetary compensation following a separation — Mantooth is reportedly seeking half of Mars' property as well as monthly support and damages.